Calculator restoring mechanism.



W. FUHBMANN & E. M. SQUAREY. CALCULATOR RESTORIVG MECHANISM.

APPLICATION FILED OCT- 26.1916. 1,23%,020.

Patented July 3, 1917,

3 SHEETSSHEET l.-

no lzwmrom H WfZ/HRMANN L E M. SQUARE) By lab-Aiming.

W. FUHBMANN 64 E. M. SQUAREY.

CALCULATOR RESTORIN'G MECHANISM,

APPLICATION FILED OCT-26.1916 1232,0200 Patente July 3, 1917.

3 SHEETSSHEET 2.

INVENTORS' W fUHRMANN E. M. SQUAREY By his fiflome q W. FUHRMANN & E. M.SQUAREY. CMCULATOR RESTORING MECHANISM.

, APPLICATION FILED OCT. 26. I916. l,%32,020. Patented July 3, 1917.

3 SHEETS-SHEET a.

W FUHRMANN E M SOUAREY WARREN FUHBBIANN, F WESTFliELD, NEW JERSEY, ANDEDWARD M. SQUAEEY, OF TUCKAI-IOE, NEW YORK, ASSIGNORS TO ADDOMETER COBIORATION, OF NEW YORK,

N. Y., A CORPORATION OF DELAWARE.

CALCULATOR BESTORING: MECHANISM.

Specification of Letters Patent.

Patented J 11137 3, 1917.

Application filed October 26, 1916. Serial No. 127,755.

To all whom it may concern Be it known that we, WARREN FUHR- MANN, acitizen of the United States, and a resident of /Vestfield, county ofUnion, and State of New Jersey, and EDWARD M. SQUAREY, a subject of theKing of Great Britain, and a resident of Tuckahoe, county ofVVestchester, State of New York, have invented certain new and usefulImprovements in Calculator Restoring Mechanism, of which the followingis a specification.

One of the objects of the present invention is to provide in acalculator including transfer mechanism, improved means for actuatingthe restoring member, whereby it will be moved to cause boththerestoring and the transfer to take place during the return movement of aside bar or main actuating member of the machine.

Another object of the invention is to provide means for actuating therestoring bar of a transfer mechanism from an actuating member thatmoves back and forth; and means for moving the adding pinions relativeto the rack bars to engage and disengage the same, which latter meansinclude a member that upon special operation of the machine to changethe normal timing of the said engagement and disengagement of thepinions, will disable the connections for shifting the restoring bar.

In the accompanying drawings illustrating one embodiment of ourinvention, Figure 1 is a side elevation at the left side of the machine.Fig. 2 is a similar view with the pitman in the fully advanced position.

Figs. 3, 4 and 5 are views of the parts in three consecutive positions.Fig. 6 shows a partial plan view. Fig. 7 shows one of the latch arms.Fig. 8 shows one of the latches. Fig. 9 shows one of the holding pawls.Fig.

10 shows the stop pawl. Fig. 11 is a partial I view on the right side ofthe machine.

In an application filed by us June 1, 1916, Serial No. 101,019, is setforth a mechanism similar to the present invention. In such constructiona swinging latch is provided on each side that cooperates with a stoprigidly attached to the pitman on such side. In the present inventionthe stop is mounted to swing on the pitman and also the latch ismovable. Further with the present construction during the initial partof the return stroke of the pitman, the moving stop member on the pitmanis caused to swing on the pitman forwardly, while still engaging thelatch at the same speed that the pitman is moving rear ard, whereby thestop in engaging with the latch remains practically stationary so thatthe latch and restoring bar actuated therefrom are not further advanced.

As shown in the drawings, 12 represents the side plate on the right-handside of the machine, and in Fig. 11 is shown a portion 13 of a similarplate on the opposite side. These plates are provided with guidingvmeans for a restoring bar 14 that extends across the plates and issecured at its ends to short bars 15 and 16 respectively; the restoringbar being guided in slots 17 and 18 in the two plates to move back andforth. Suitable means are provided to move the bars 15 and 16 back andforth in unison, which means are shown in duplicate, one on each of theside plates. An arm 19 swings on a stud 20 on the side plate 12, and ispivoted to a link 21 that is pivoted to the said bar 15 by a stud 22;which latter rides in a slot 23 in the side plate to cause the bar 15 tomove back and forth in a straight line. The swinging of the arm 19 willevidently reciprocate the bar 15 and move the restoring bar 14, or oneend of it back and forth in the guide slot. One arm 24 of an angle leverswings. on stud 25 and is pivoted to the arm 19; while the other arm 26of the angle lever extends vertically downward. On this arm 26 ispivoted a bar 27 extending rearwardly and guided at its slotted portion28 on a stud 29. On the bar 27 a latch 30 is pivoted by a stud 31, and aspring 32 normally presses the forward end of the latch downwardly sothat an ear 33 on the latch engages the top' edge of'the bar 27. (SeeFig. 8.) The latch has a lug 34 on its lower edge, whose forward face issubstantially vertical, while the rearward face is beveled.

A pitman 35 is shown that is swung by means of cranks 36 and 37, fromthe normal position shown in Fig. 1. to its forward position as shown inFig. 2. On this pitman is pivotally mounted a stop pawl or stop 38 bystud 39, that is normally held against a pin 40 on the pitman by aspring 41. This stop pawl carries a pin 42 that lies just below thelatch 30 as indicated in Fig. 1, and

when the pitman is drawn forward this pin 42 will strike the inclinededge of the lug 34 and swing the latch upward until it passes the lug,when the latch will fall and the pin will lie in front of the lug, asindicated in Fig. 2. When the pitman starts its return stroke from theposition shown in Fig. 2, as the stop pawl 38 is prevented from swingingto move its pin 42 forward, (by means to be set forth) this pin willengage the lug to move the latch rearward. This will cause the bar 27 tomove rearward and swing the vertical arm 26, which movement will swingthe arm 24 upwardly to swing arm 19 and link 21 upward, and henceadvance the bar 15 to move the restoring bar 14, or this end of it,toward the front of the machine. But after initial movement on thereturn stroke of the pitman, the stop pawl 38 is no longer restrained,and will swing on the pitman to release the latch, which is effected assoon as the restoring bar is given its proper forward movement throughsaid means. restraining of the stop pawl 38 is accomplished by means ofa roller pin 43 that is fixed on the side plate 12. As shown in Fig. 1,this fixed pin 43 is normally free of thestop pawl 38; but when thepitman.

makes its full advance carrying with it the stoppawl, as shown in Fig.2, this fixed pin 43 will lie beneath a shoulder 44 of the stop pawl,and will prevent the upper portion of the pawl carrying the pin 42, fromswinging forward on the pitman by its engagement with the latch lug -34,on the rearward movement of the pitman and stop pawl. Hence theengagement of the pin 42 with the latch will swing the said arms andlinks and cause the forwardmovement of the restoring bar at this end.But as this movement continues, the stop pawl will be carried rearwardand the fixed pin 43 will ride along the pawl shoulder 44 until itreaches the curved edge 45, (se'eFig. 5), that will permit a slightswing of the pawl onthe pitman. This curve is eccentric to the axis ofthe pawl, and hence will still slightly retard the swing ofthe pawl. Thecontinued advance of the pawl and pitman will permit the pawl to swingforwardly on the pitman free from pin 43, and the pin will no longerrestrain its movement, so that the pin 42 on the pawl will release thelatch lug 34, and the latch and connected parts will be no longer movedrearwardly. The contour of this curved edge 45 of the stop pawl is sodesigned that the pin 42 on the pawl will move forwardly relative to theside I plate, at practically the same speed that the pitman is nowmoving to the rear, which results in the pin 42 remaining practicallystationary relative to the side plate, although it will have a slightdownward -movement in a verticalpath. From this it follows that Thisfore, as soon as the pin 42 releases the latch that has effected theforward movement of the restoring bar and connected parts, this spring46 would return these parts to normal position unless otherwiserestrained. However, in the operation of the machine the restoring barmust be held in the for-- ward position until the latter part of thereturn stroke of the pitman, and then released.

The restraining means set forth comprise on one side, a detent pawl 50pivoted on the side plate 12 and provided with a shoulder 51 adapted toengage with the lower extremity of the arm 26 and hold the arm with therestoring bar advanced, as .shown in Fig. 3. The pawl is pressedupwardly against the arm 26 by a spring 52. In the normal position ofFig. 1 this pawl engages the end of the arm 26 beyond the shoulder, butas this arm swings forward when the arm 24 swings upward on advance ofthese parts by the latch, the end of arm 26 will move rearward beyondthe shoulder, and hence will engage the shoulder when the latch isreleased from the stop pawl on the pitman At the final part of thereturn stroke of the pitman, a stud 53 on a strip 54 fast on the pitman,will strike an" arm 55 of the pawl 50 and swing the pawl so that itsshoulder 51 will release the arm 26; whereby the connected parts arefree to be retracted by the spring 46 to normal position.

On the opposite side of the machine a duplicate of these parts isprovided, as shown in Fig. 11. An arm 59 swings on a stud 60 on the sideplate 13, and is pivoted to a link 61 that is pivoted to the said bar 16by a stud 62; which latter rides in a slot 63 in the side plate to causebar 16 to move horizontally. One arm 64 of an angle lever pivoted at 65,is pivoted to the arm 59, while the other arm 66 of the angle leverextends downwardly. On the arm 66 is pivoted a bar 67 extendingrearwardly and guided at whereby the two pitmen move back and forth inunison. The pitman has a stop pawl 78 pivoted thereon by stud 79, thatis held against a pin 80 on the pitman by a spring 81. .This stop pawlcarries pin 82 that lies just below the latch 70 and will engage andcotiperate with this latch, as described with reference to the similarlatch on the opposite side. A roller pin 83 is secured to the side plate13, and cotiperates with a shoulder 84, and curved edge 85, of the stoppawl 78. On this side of the machine a spring 86 serves to retract therestoring bar and the connected parts just described, when they havebeen advanced by engaging of-the stop pin 82 with the lug 74 of thelatch 70.

A detent pawl 90 is pivoted on the side plate 13, and has a shoulder 91,that is pressed toward the end of the arm 66 by a spring 92. A pin 93 ona strip 94 carried by the pitman 75, will strike an arm 95 of the pawl90, at the final part of the return stroke of the pitman, whereby toswing the pawl to release the arm 66.

111 machines of this character, special operations are effected that arebrought about by depression of special keys, that change the timing ofthe engagement of the adding pinions with the rack-bars and thesegments. During such special operations no carrying is effected andhence the restoring bar should not be shifted. We provide means wherebyduring the depression of any of these special keys this mechanism forshifting the restoring bar is disabled. Tn Figs 1 and 2 are shownspecial keys 47, 48 and 87, that when either is depressed, will engagethe lever a9 and depress the lever and hold it depressed until the keysare restored. This lever is fast to a shaft 56 and will raise an arm 57that is arranged to engage a pin 58 on the latch 30. This movement issutiicient to hold the latch with its lug 3a out of position forengagement with the stud 42 on the stop pawl. (See Fig. 2.) Therefore,the latch will not be engaged by the advance and return of the pitman.The shaft 56 8X- tends across the machine and there carries an arm 76that serves to elevate a strip 77, (see Fig. 11). The latter will engagea pin 1 on the latch 7 0, so that this latch will be raised at the sametime that the latch 30 is raised. Thus the depression of either key willraise both latches and prevent any movement of the restoring bar by thepitmen, until the key is restored. Means are shown in Fig. 1 forretaining the keys 4.7, 87 and 48 depressed when they are operated untilthe return stroke of the pitman 35. A bar 2 is suitably guided toreciprocate and has inclined slots 3,4: and 5 that engage pins 6, 7 and8 on the keys 4:7, as and 87 respectively. When either key is depressedthe pin will engage the wall of the slot and move the bar 2 rearward tofurther tension its retracting spring 100. The bar 2 is locked in itsrearward position by a latch 88 that engages a notch 89 in the bar. Thelatch 88 carries a pawl 101 that will be engaged by a pin 102 on thepitman 37 at the latter portion of its return stroke, whereby the latchwill be swung to release the bar 2 and permit the keys 47, 48 and 87 tobe retracted by their respective springs 9, 10 and 11. On the forwardstroke the pawl 101 will swing and not shift the latch.

The purpose of the restoring bar is to control carrying segments 96,that coiiperate with the adding pinions 97. These pinions are shiftedback and forth between a posi tion engaging the segments 96 as shown inFig. 1, and a position engaging the rack-bars 98, as shown in Fig. 2, bysuitable means, not herein shown. In the normal operation of adding, thepinions remain forward engaging the segments during the forward strokeof the pitman, and at the end of such stroke the pinions are shiftedfree of the segments and engage the rack-bars. The pinions remain insuch position until the latter portion of the return stroke, when theyare brought forward to again engage the carrying segments. Therefore,the carrying operation of the segments is effected at this latter partof the return stroke, when the pinions are again brought to engage thesegments, and this is usually done by a spring 99 on each segment, byreason of the restoring bar moving rearward at this time 4 to permitsuch spring to swing the segment- Those segments that have been trippedto carry, remain in this position at the end of an operation, and suchsegments are returned to a latched position when the restoring bar ismoved forward at the inital part of the succeeding return stroke of thepitmen. it is customary in this art, when the segments are restored,that they are engaged by a suitable latch or pawl, that is tripped whenthe pinions pass the numeral 9 tocarry.

In the operation of the device, the pitman moves forward from the normalposition of Fig. l to that indicated in Fig. 2,

and the stop pawl 38 will be carried forwardly, its pin 42 striking thebeveled edge I of the lug 34: to swing the latch 30 upward until at theend of this movement, the pin will pass beyond the lug 34 and the latchreturn to former position, as shown in Fig. 2 in the broken lineposition. In this view the latch is shown in full as lifted by thedepression of the special key 48. During this forward movement, thelatch merely swings upward and is retracted without moving any of theconnected parts. As the pitman begins its return movement, the pin 42will engage the lug 34, tending to swing the stop pawl 38 forward, butthis is prevented by the roller pin 43 now positioned beneath theshoulder 44 of this pawl. Hence the pawl cannot swing on the pitman andthe pin 43 must move the lug and latch 30 rearward. As shown this lughas a transverse shoulder, and the pin engages the latch below its axison the bar 27, the latch and bar will be shifted rearward, to swing thearms 26, 24 of the bent lever, that will move the link arms 19 and 21and bar 15,

to move the restoring bar 14 forward, or this end of it. As the twopitmen move forward and back in unison and as the parts just describedare duplicated on the opposite side as shown in Fig. 11, this end of therestoring bar will be moved forward in unison with the other end. Butthis movement of the pitman and stop pawl 38 rearward will cause thepawl to engage the pin by its curved edge 45, that will permit a slightswinging of the pawl forwardly. This movement is so designed that atthis stage the forward movement of the pin 43 on the pawl correspondswith the rearward move: ment of the pitman, which means that the pin 43will practically stop movement relative to the side plate and hold thelug 34 and other parts in the advanced position. This is effected whenthe restoring bar 14 has been moved the required distance, or a veryshort excess movement. On the opposite side the stop pawl performs thesame function. This position of the parts is indicated in Figs. 3 and 4,but in the latter the pawl 38 is moving its curved edge 45 downwardlyand is no longer restrained by the roller pin 43. This will nowreleasethe pawl 38 and the retractile springs 46 and 86 will tend to return thelatch bar and connected parts. But when the arm 26 was swung forwardwith the advance of the restoring bar, its lower end became engaged bythe shoulder 51 of the pawl 50, and now upon the arm 26 being releasedby the latch, it will be held against retraction by this detent pawl. Onthe other side the arm 66 will be held by the pawl 90 in the same manner. Hence the restoring bar will be held at both ends in the advancedposition. As

the pitmen reach the final part of the return stroke they will swing thedetent pawls 50 and 90 to release the arms 26 and 66, and the tworetractile springs will return the restoring bar and connected parts oneach side to normal position, as in Fig. 1. The stop pawls 38 and 7 8will be released from the lugs on the latches and swung back to normalupright position, as indicated in Fig. 5.

The depression of either of the three keys 47, 48 or 87 will swing thelevers 49 and 76, to shift and hold the latches 30 and 70 out ofposition for engagement with the pins on the two stop pawls. Therefore,the restoring bar will not be disturbed by the advance of the pitman.

Having thus described our invention, What we claim is 1. In acalculator, the combination of a restoring bar, shifting means for thebar, retracting means for the bar and shifting means, a pitman,connections between the pitman and a member of the shifting meanscomprising a latch-pivoted on one of these members and a stop pivoted onthe other member that is engaged by the latch, the stop and latch beingarranged whereby on advance of the pitman the latch will swing Withoutmoving the shifting means and bar, but on the return stroke of thepitman the stop and latch will engage whereby to shift the restoringbar, means arranged to shift the stop and release the latch after theinitial movement of the restoring bar, whereby the bar and shiftingmeans are released for retraction, means arranged to engage and hold theshifting means and re'-' storing bar in advanced position on said release of the latch and stop, said holding means at the final part of thereturn stroke of the pitman being caused to release said shifting meansto permit full retraction of the shifting means and restoring bar.

2. In a calculator, the combination of a .to shift the stop and releasethe latch after the initial movement of the restoring bar, whereby thebar and shifting means are released for retraction, means arranged toengage and hold the shifting means and restoring bar in advancedposition on said release of the latch and stop, said holding means atthe final part of the return stroke of the pitman being caused torelease said shifting means to permit full retraction of the shiftingmeans and restoring bar, special keys on the machine, and means forcausing the operation of said keys to shift the latch out of range ofthe said stop.

3. In a calculator, the combination of a restoring bar, shifting meansfor the bar, retracting means for the bar and shifting means, apitman,connections between the pitman and a member of the shifting meanscomprising a latch pivoted on one of these members and a stop pivoted onthe other member that is engaged by the latch, the stop and latch beingarranged whereby on advance of the pitman the latch will swing storingbar in advanced position on said release of the latch and stop, saidholding means at the final part of the return stroke of the pitman beingcaused to release the shifting means to permit full retraction of theshifting means and restoring bar.

8. In a calculator, the combination of a swinging lever, a restoringbar, connections between the bar and lever, means to retract the bar andlever, a latch pivotally connected with the lever, a pitman, a steppivoted on the pitman and arranged to engage said latch, the stop andlatch being arranged whereby on advance of the pitman the latch willswing without moving the lever and bar, a fixed pin on the machinearranged to engage the pitman stop during initial return movement of thepitman whereby to cause the stop to advance with the pitman and move thelatch and lever to shift the restoring bar, said pin upon furtheradvance of the pitman being disengaged from the stop whereby the stopwill swing on the pitman and release the latch, means arranged to engageand hold the lever and restoring bar in advanced position on saidrelease of the latch and stop, said holding means at the final part ofthe return stroke of the pitman being caused to release the lever topermit full retraction of the lever and restoring bar.

9. In a calculator, the combination of a swinging lever, a restoringbar, connections between the bar and lever, retracting means for the barand lever, a latch pivotally connected with the lever, a pitman, a stoppivoted on the pitman and arranged to engage said latch, the stop andlatch being arranged whereby on advance of the pitman the latch willswing without moving the lever and bar, a fixed pin on the machinearranged to engage the pitman stop during initial return movement of thepitman whereby to cause the stop to advance with the pitman and move thelatch and lever to shiftthe restoring bar, said pin upon further advanceof the pitman being disengaged from the stop whereby the stop will swingon the pitman and release the latch, a pawl having a shoulder arrangedto engage said lever when advanced by said means whereby to hold thelever and restoring bar inadvanced position on release of the latch fromthe pitman stop, and means on the pitman to swing the pawl at the finalpart of the return stroke of the itman to release said lever and permitful retraction of the lever and restoring bar by said means.

10. In a calculating machine, the combination with adding mechanismincludin a series of counters, a restoring bar extendlng across themachine to cooperate with all of the counters, and a-pitman on each sideof the machine, of a lever swinging on each side plate, connectionsbetween each said lever and the bar, means on each side plate to retractthe bar and lever, a latch pivotally connected with each lever, a stoppivoted on each pitman and arranged to engage the adjacent latch, thestop and latch being arranged whereby on advance of the pitman the latchwill swing without moving the lever and bar, a fixed pin on each side ofthe machine arranged to engage each pitman stop during initial returnmovement of the pitman whereby to cause the stop to advance with thepitman and move the latch and lever to shift the restoring bar, eachsaid pin upon further advance of the pitman being disengaged from thestop whereby the stop will swing on the pitman and release the latch oneach side, a pawl on each side plate having a shoulder arranged toengage the adjacent lever when advanced by said means whereby to holdthe levers and restoring bar in advanced position on release of eachlatch from its pitman stop, and means on each pitman to swing its pawlat the final part of the return stroke of the pitman to release saidlevers, and permit full retraction of the levers and restoring bar bysaid means. a

11. In a calculator, the combination of a restoring bar, shifting meansfor the bar, retracting means for the bar and shifting means, a pitman,connections between the pitman and a member of the shifting meanscomprising a latch pivoted on one of these members and a stop on theother member that is engaged bv the latch, the stop and latch beingarranged whereby on advance of the pitman the latch will swing withoutmoving the shifting means and bar, but on the return stroke of thepitman the stop and latch will engage whereby to shift the restoringbar, means arranged to shift the stop and release the latch after theinitial movement of the restoring bar, whereby the bar and shiftingmeans are released for retraction, means arranged to engage and hold theshifting means and restoring bar in advanced position after slightretraction on said release of the latch and stop, said holding means atthe final part of the return stroke of the pitman being caused torelease said shifting means to permit full retraction of the shiftingmeans and restoring bar.

12. In a calculator, the combination of a swinging lever, a restoringbar, connections between the bar and lever, retracting means for the barand lever, a latch pivotally connected with the lever, a pitman, a

stop pivoted on the pitman and arranged to engage said latch, the stopand latch being arranged whereby on advance of the pitman thelatch'willswing without movin the lever and bar, a fixed pinon the macine arranged to engage the pitman stop during initial return movement ofthe pitman whereby to cause the stop to advance with the pitman and movethe latch and lever to shift the restoring bar, said pin upon furtheradvance of the pitman being disengaged from the stop whereby the stopwill swing on the pitman and release the latch, a pawl having a shoulderarranged to engage said lever when advanced by said means whereby tohold the lever and restoring bar in advanced position after slightretraction on the release of the latch from the pitman stop, and meanson the pitman to swing the pawl at the final part of the return strokeof the pitman torelease said lever and permit full retraction of thelever and restoring bar by said means.

13.'In a calculator, the combination of a restoring bar, shifting meansfor the bar, retracting means for the bar and shifting means, a latchpivoted on the shifting means, a pitman, a stop pivoted on the pitmanand arranged to engage said latch, the stop and latch being arrangedwhereby on the advance of the pitman the latch will swing without thestop causing movement of the shifting means and bar, a fixed pin on themachine arranged to engage the pitman stop during initial returnmovement of the pitman whereby to prevent the stop from swinging butcause it to advance with the pitman while engaging with the latch to.

thereby advance the latch and shifting means to shift the restoring bar,the fixed pin and stop upon further return movement of the pitmanpermitting free swing of the stop on the pitman whereby to release thelatch for retraction, means arranged to engage and hold the shiftingmeans and restoring bar in advanced position on said re- 40 lease of thelatch, said latter holding means at the final part of the return strokeof the pitman being caused to release the shifting means to permit fullretraction of the shifting means and restoring bar.

14. In a calculator, the combination of a restoring bar, shifting meansfor the bar, retracting means for the bar and shifting means, a latchpivoted on the shiftingmeans, a pitman, a stop pivoted on the pitman andarranged to engage said latch, the stop and latch being arranged wherebyon the advance of the pitman the latch will swing without the stopcausing movement of the shifting means and bar, a fixed pin on themachine arranged to engage the pltman stop during initial returnmovement of the pitman whereby to cause the stop to advance with. thepitman while engaging with the latch to thereby advance the latch andshifting means to shift the restoring bar, said stop and fixed pin uponfurther advance of the pitman permitting the stop to swing on the pitmanwhereby its engaging portion with, the latch will have a rearwardmovement relative to the advancing pitman that will remain practicallystationary and not further advance the latch, the fixed pin and stopupon further return movement of the pitman permitting free swing of thestop on the pitman whereby to release the latch for retraction, meansarranged to engage and hold the shifting means and restoring bar inadvanced position on said release of the latch, said latter holdingmeans at the final part of the return stroke of the pitman being causedto release the shifting means to permit full retraction of the shiftingmeans and restoring bar.

WARREN FUHBMANN. EDWARD M. SQUABEY.

